201. In an artesian acquifer, the draw downs in two observation wells at distances 100 m, and 200 m were found same after one hour and x hours respectively. The value of x, is
202. Dissolved carbon dioxide, can be removed from the supply main by
203. Slow sand filter is used if maximum turbidity of raw water is less than
204. The external load per unit length of
205. The total domestic consumption in a city water supply, is assumed
206. Alum is a
207. ‘Njanoru puthiya lokam kandu’is a book written by?
208. In a reservoir the average volume of sediment deposition is 0.15 million cubic per year. If the dead storage and total capacity of the reservoir are 8 million cubic metres and 36 million cubic metres respectively,
209. Silver revolution related to?
210. The requirement of water per capita per day, is
211. Pick up the incorrect statement from the following. In take of water supply should
212. Reciprocating pumps
213. The temporary hardness of water can be removed by
214. Rapid gravity filters
215. If n is porosity, y is specific yield and r is specific retention of any soil, the relationship which holds good, is
216. The coefficient of permeability of soils, is generally expressed in
217. Total flow in stream is known
218. Disinfection of drinking water is done to remove
219. The ratio of total capacity and dead storage is kept
220. The U.C. (uniformity coefficient) for the best filter media sand should be
221. Specific yield of a well is
222. Normal values of overflow rate for plain sedimentation tanks in litres/hr/m2, generally range between
223. The formula for the head loss in conduits is generally known as
224. Manholes are less common in
225. While designing a water supply of an industrial township, industrial and commercial water demand of total supply, is assumed